System of electric distribution



(No Model.)

T. A. EDISON.

SYSTEM OF ELECTRIC DISTRIBUTION.

Patented Oct. 80, 188.3.

'A'T'I'EBT:

N, RTEBS. MW. Wamlon. D. C,

UNITED STATES PATENT OFFICE.

THOMAS'A. EDISON, on MENLO PARK, New JERSEY.

SYSTEM OF ELECTRIC DISTRIBUTION.

SPECIFICATION forming part of Letters -Patent No. 287,516, dated October 30, 1883.

Application filed May 14, 1883. (x0 model.) a

To ail whom it may concern Be it known that I, THOMAS A. EDISON, of

Menlo Park, in the county of Middlesex and State of New Jersey, have invented a new and useful Improvement in Systems of Electrical Distribution, (Case N o. 564,) of whichthe following is a specification. The object of this invention is to provide a system of electrical distribution wherein currents can be economically transmitted from a distant source of energysuch as a waterpowerto the town, village, or other locality which is to be supplied, and there distributed from different independent central stations, situated at convenient points, to the various parts of such locality.

Generally speaking, such system consists of a sufficient number of electrical generators of high electro-motive force situated at the source of power, mainconductors of small area extending from such generators to the locality to be supplied, devices connected with such conductors in multiple are for reducing the tension of the current, each device or set of 1 main conductors, the other of coarser wire,

able manner.

connected with a commutator from whose brushes the circuit or circuits extend, on which the translating devices are arranged, preferably, in multiple arc. The field-magnets may be energized by a constant current in any suit- Where it is desired to employ the compensating system set forth in my Patent No. 274,290, I wind the core with three sets of coils, one acting as a motor-coil and the other two as generator-coils. Preferably two commutators are provided for these generatorcoils, one set of coils being connected to each commutator. The main conductors of the discompensating-conductor is connected with two brushes-one on each cylinder-and the translating devices are connected each between a main conductor and the compensating-conductor,-as usual.

My invention is illustrated in the annexed drawings, in which Figure 1 is a diagram of the system, the field-magnetsbeing omitted from the combined generatorsand motors; Fig. 2, asectional view of the armature with two windings, and Fig. 3 a section of the armature with three windings.

1 A A represent generators of high electromotive force, connected in multiple arc to main conductors 1 2; or two or more generators may be connected in series to produce the electromotive force required. At a point where it is desired to place stations or centers of dis-. tribution a multiple-arc circuit, 3'4, is con nected with the main conductors 1 2. The conductors of such multiple-arc circuits exon one of the commutatoncylinders, while the tend to brushes a a, bearing on a cornmutatorcylinder, b, of an armature, B or B.

The armatures B each consist of a core, h, on which are wound two sets of c0i1s-one coil, 0, of fine wire, connected with commutator b,

the other, 0, of coarser wire, connected with commutator I). The coils c are of such high resistance that the main conductors are not .short-circuited through them. A common continuous current of such tension as is provided for by the winding of the coils.

Oommutator-brushes d (I rest upon the cylinder b, and conductors 5 6 extend from such commutator-brushes, translating devices e e being placed in multiple-arc circuits'across such conductors, and being thus supplied with currents of theproper tension.

The armature B has three sets of coils, one, o, forming the motor-coils, the others, 0 0, being the generatingcoils. The coils c are connected to the commutator-cylinder I), and

tributing-circuit are each connected to a brush i the coils c to the cylinder b. The conductors 5 6 extend from the brushes ff, which bear one on each of these cylinders, and the compensating-conductor? is connected with the two opposite brushes, f f. The translating devices e e are connected between the co1npensating-conductor and the main conductors, as shown.

It is evident that a single commutator-cylinder could be employed, instead of the two commutators b b, with the conductors 5 6 connected to main brushes, bearing on said commutator, and the compensating-conductor 7 connected to an extra brush placed between them. I

It is evident that the coils c c in the triplewound machine could be of the same size wire as thecoils c, for the use of two sets of such coils will accomplish a certain reduction of tension, and in a compensating system the currents used are of higher tension'than in the ord nary system. f

In the system described in my Patent No.

265,786, above referred to, severalcombined generatorsand motors are shown, the motorcoils being placed in series in one of the main conductors and translationcircuits leading from the generating-coils. In this case the devices are not independent, and therefore the arrangement is inapplicable to my present purpose of providingzindependent distributing-stations, at which apparatus is placed for, reducing the tension of the current.

5 It will be seen that by my present arrangement the tension reducing devices, being placed in multiple are, are entirely independ ent of each other, and either can be thrown out of use without affecting the others.

WVhat I claim is y 1. In a system of electrical distribution, the combination of..a-source of electricity,-main conductors extending therefrom, two or more combined generators and motors having their motor-coils connected in multiple arc with said main conductors, distributing circuits extending from their generating-coils, and.

translating devices connected with such distributing-circuits, substantially as set forth.

2. The combination, withmain conductors, I

of a tension-reducing device connected therewith, a distributing-circuit and a compensat. ing-conductor extending from said tensionreducing device, and translating devices connected between the main conductors of said distributing-circuit and said compensatingconductor, substantially as set forth.

3. The combination, with a core, of a motorcoil connected with main conductors, two generator-coils, each connected with a commutatorcylinder, main distributingconductors connected each with a brush bearing on one commutator, and a compensating-conductor connected with both the opposite brushes, substantially as set forth.

' This specification signed and witnessed this 8th day of May, 1888.

THOS. A. EDISON.

Witnesses:

WM. '11. Mnanowcnor'r, H. W. SEELY. 

